I always see him either dead on the ground, or walking around, but I've never seen him "fight". Does he go haywire sometimes or something? Or is it a glitch?
He's just over dramatic and likes the attention so he occasionally pretends to fall over for sympathy ;-)
I have a wild theory, but here goes. My theory is that the devs are secretly the npcs and use them to monitor what's going on. I remember seeing a proto bot running then it stopped and looked at me. It sounds like a crazy Dcuo conspiracy theory, but I feel like it's true.
I mean, they have their own accounts that have admin privileges, but the idea of them playing as NPC’s is hilarious.